public MongoliaStationImporter() {
String persistenceUnitName = "persistenceUnit";
EntityManagerFactory factory = Persistence.createEntityManagerFactory(persistenceUnitName);
this.entityManager = factory.createEntityManager();
MongoliaStationDaoImpl mongoliaStationDaoImpl = new MongoliaStationDaoImpl();
mongoliaStationDaoImpl.setEntityManager(this.entityManager);
this.mongoliaStationDao = mongoliaStationDaoImpl;
}